TW201604582A - Amplification method of image - Google Patents

Abstract

The present invention relates to an amplification method of image, the amplification method of image includes several steps as followings: Provide a camera module, the camera module includes an image sensor and a lens that relatives to the image sensor; Provide a lens module, the lens module is anti-mounted on the lens, to ensure that the exit pupil of the lens module opposites to the entrance pupil of the camera module to form an optical system of amplification image, the magnification of the optical system is determined by the design features of the lens module.

Description

Image enlargement method

The invention relates to an image enlargement method, in particular to an image enlargement method for a mobile phone.

Fixed-focus lenses generally have image sensors placed on the focal plane of the lens to facilitate imaging of distant objects. Such lenses have a lower imaging height and the image quality is directly reduced.

In view of this, it is necessary to provide an image enlargement method for increasing the magnification.

An image enlargement method includes the following steps:

Providing a camera module for basic imaging, the camera module comprising an image sensor and a lens opposite to the image sensor;

Providing a lens module for performing back projection, the lens module being reversely mounted on the lens, and ensuring an optical system for amplifying the image by means of the exit of the lens module to the camera module, The magnification of the optical system is determined by the design characteristics of the lens module.

The image magnifying method of the present invention can enlarge the image by more than 25 times by forming an enlarged optical system by inserting the lens module into the camera module, thereby effectively increasing the magnification and less than the object distance. Clear imaging at 10mm.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the state of use of a preferred embodiment of the present invention.

Referring to FIG. 1, an image enlargement method according to a preferred embodiment of the present invention includes the following steps:

A camera module 10 for performing basic imaging is provided. The camera module 10 includes an image sensor 11 and a lens 12 opposite to the image sensor 11. The length of the long side of the image sensor 11 is 1.8mm, the focal length of the lens is 3mm;

An object 20 is provided, the object 20 is disposed opposite to the camera module 10, and the height of the object 20 is 1 mm;

A lens module 30 for back projection is provided. The lens module 30 is reversely mounted on the lens 12 such that a lens (not shown) of the lens module 30 is opposite to the lens 12 and is disposed adjacent to the lens module 12 to ensure The exit pupil of the lens module 30 (the common exit of the light beam passing through the entire optical system from the last optical aperture after passing through the entire optical system) enters the camera module 10 (the light beam emitted from all points on the object surface) The common entrance method forms an optical system 100 for magnifying images. The focal length of the lens module is 3 mm, and the distance between the lens of the lens module 30 and the lens 12 is 1 mm, which is calculated according to the equivalent focal length EFL formula. The equivalent focal length of the optical system is 1.8 mm, and the distance between the image sensor 11 and the lens 12 is 3 mm, that is, the image distance q is 3 mm, and the object distance p is calculated to be 4.5 mm according to the imaging formula.

In this embodiment, the image height of the object 20 on the image sensor 11 is about 0.67 mm, and the height of the object 20 imaged on the image sensor 11 is about the length of the mobile phone screen (not shown). 37.2%, about 33.48mm, is 33.5 times larger than the actual object seen directly with the naked eye. In this embodiment, a mobile phone is taken as an example, and the length of the long side of the screen is 90 mm.

The image magnifying method of the present invention can enlarge the image by more than 25 times by forming an enlarged optical system by inserting the lens module into the camera module, thereby effectively increasing the image magnification and the object distance. Clear imaging when less than 10mm.

It can be understood that the present embodiment is a mobile phone as an example, but is not limited to the embodiment. The image enlargement method of the present invention can also be used in other fields, for example, a product that can be independently combined with a display panel to become an electronic magnifying glass; , applied to the work that needs to do the fine amplification test.

It is to be understood that those skilled in the art can make various other changes and modifications in accordance with the technical concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.

100‧‧‧Optical system

10‧‧‧ camera module

11‧‧‧Image Sensor

12‧‧‧ lens

20‧‧‧ objects

30‧‧‧Lens module

D‧‧‧ spacing

P‧‧‧object distance

Q‧‧‧image distance

no

100‧‧‧Optical system

10‧‧‧ camera module

11‧‧‧Image Sensor

12‧‧‧ lens

20‧‧‧ objects

30‧‧‧Lens module

D‧‧‧ spacing

P‧‧‧object distance

Q‧‧‧image distance

Claims (4)

An image enlargement method includes the following steps:
Providing a camera module for basic imaging, the camera module comprising an image sensor and a lens opposite to the image sensor;
Providing a lens module for back projection, the lens module being reversely mounted on the lens, ensuring an optical system for amplifying the image by means of the exit of the lens module to the camera module, the optical The magnification of the system is determined by the design characteristics of the lens module. The image enlargement method according to claim 1, wherein the optical system can clearly image when the object distance is less than 10 mm. The image enlargement method according to claim 1, wherein the optical system can magnify the image by more than 25 times. The image enlargement method according to claim 1, wherein the lens of the lens module is opposite to the lens and disposed adjacent to the lens.